By Laura Bannon

CHICAGO (CBS)– November starts off with a significant drop in temperatures.

This colder feel will last for most of the week.

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A Freeze Warning is in effect until 9 a.m. for counties west of Cook, DuPage, and Will. After a cold Monday morning, highs only reach the middle to upper 40s.

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Highs in the 40s with lows near freezing.

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By Friday, temperatures reach the 50s.

Laura Bannon